Stroboscopic time-resolved SANS technique for dynamical studies of slow relaxation processes

Abstract We developed a stroboscopic time-resolved SANS technique for the instrument V4 at BENSC Berlin, based on the listmode data acquisition provided by the new readout system of the 2D detector. This technique allows the investigation of reversible dynamical processes with time constants of several 100 ms, which are by far too slow to be measured by quasi-elastic or spin-echo neutron scattering techniques ( −8  s), but too fast for conventional SANS. We describe background and main features of this technique, and demonstrate its application in conjunction with polarized small-angle neutron scattering.